The homoleptic high-nuclearity platinum−copper acetylide complex of stoichiometry [PtCu 2 (C⋮CPh) 4 ] crystallizes in at least three different polymorphic forms. Dark violet-green crystals with metallic reflectance have been shown by an X-ray diffraction study to be formed by discrete trimers of an hexanuclear octahedral cluster unit {[Pt 2 Cu 4 (C⋮CPh) 8 ]} 3 stabilized by two unsupported Pt−Pt interactions [2.995(1) Å]. The photoluminescence behavior of this complex which is dramatically influenced by strong axial Pt···Pt interactions either in solid state or in solution (CH 2 Cl 2 298, 77 K) has been studied.
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Charmant et al. (1999) studied this question.
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